[linux-dvb] Re: Question about PTS in TS

[Nicola Sabbi <sabbi@students.cs.unibo.it>]

Yes, and mplayer's sync smoother makes an excellent work at resyncing :)
4 or 5 seconds are usually enough to have lip-sync.

On Wed, 14 May 2003, Arpi wrote:

> Hi,
> 
> > often when parsing a TS coming from DVB drivers, I read an audio PTS
> > roughly 4 seconds lower than the corresponding video PTS closest to it.
> > 
> > I determine the pts based on the content of the PES header when
> > payload_unit_start_indicator is 1; is it correct?
> > 
> > As far as I understand there's no pts indication in the ES field, right?
> > 
> > I wonder if this is normal and if I need to correct the pts using some
> > content present in the tables or in some other field.
> > 
> > Can anyone shed some light, please?
> 
> I've also noticed that (huge) 4-6 sec audio preload in TS streams, while
> working on mplayer-g2's a-v sync code. samples (at ftp.mplayerhq.hu) shown
> that audio is started 4-6 sec earlier, so i have to compensate (pause video
> for such long time) to get a-v sync. Ie. the PTS values from header are
> correct, just the audio preload is unusally big.
> 
> 
> A'rpi / Astral & ESP-team
> 
> --
> Developer of MPlayer, the Movie Player for Linux - http://www.MPlayerHQ.hu
> 
> 
> -- 
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